Light bar



FIG. 1 is a front elevational view of a light bar incorporating our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right end elevation view thereof, the left end elevation view being a mirror image thereof;

FIG. 4 is a rear elevation view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a light bar, as shown and described. 